uac.h File Reference

USB Audio Class 1.0 (UAC1) device class: speaker + microphone, app API. More...

#include "usb_class.h"

Data Structures
struct	uac_opts
	UAC1 configuration: microphone source + speaker sink callbacks. More...

Typedefs
typedef struct uac_audio	uac_audio
	One USB Audio function: a single instance of the class on a device.

Functions
uac_audio *	uac_add (usbip_device *dev, const uac_opts *opts)
	Add a UAC1 audio interface (speaker + microphone) to a device.
void	uac_tone (uint8_t *buf, int frames, uint32_t index)
	Fill a buffer with the built-in synthetic microphone tone.

Variables
const usbip_device_class	usbip_device_uac
	The UAC1 audio class, for usbip_device_add_class()

Detailed Description

USB Audio Class 1.0 (UAC1) device class: speaker + microphone, app API.

Presents a full-speed UAC1 audio device: an AudioControl interface (two playback/capture terminal chains, each with a mute+volume Feature Unit) plus two AudioStreaming interfaces - a stereo speaker (isochronous OUT) and a mono microphone (isochronous IN), both 48 kHz / 16-bit PCM. The microphone streams a built-in 440 Hz synthetic tone (or app-supplied frames); the speaker is a sink that meters the level and hands the PCM to the app. Built on usbip_device.h only.